Marker-TPL Templating Engine is a very fast and 100% secure ^[*] PHP Templating Engine and is available for both PHP and Javascript ^[**] languages.
Because the Marker-TPL Templating is rendering the Views by injecting plain strings and data arrays directly into these Views (no re-interpreted PHP/Javascript code) there are NO SECURITY RISKS like injecting malicious code into the Views like in the case of using the Twig Templating for PHP or Smarty Templating for PHP. The original concept of Marker-TPL Templating was inspired by simplistic mark(er)s used in templates by Typo3 CMS. Thereafter, a full new concept was developed from the scratch into Smart.Framework based on this idea as a brand new TPL engine: Marker-TPL.
The Marker-TPL Templating Engine, built into Smart.Framework begins by using markers that have a start [ and stop ] limits and marking variables are enclosed in 3 # # #. At the very begining the full escaping syntax was developed for these markers to escape: html, js, url, json, ... and more ... was added a support for loading SUB-TEMPLATES files. Later the support for IF / ELSE, LOOP, SPECIAL CHARACTERS and COMMENTS syntax was finalizing this concept.
Currently the TPL Marker Syntax Templating Engine for PHP (and TPL Marker Syntax Templating Engine for Javascript [**]) is a mature project, fully developed and maintained inside the code base of Smart.Framework. It is heavily tested in production on web servers serving million+ page views / day.

	Marker-TPL Syntax	Explanation
1.	MARKERS * with optional escapings or transformers	[###MARKER###] with optional escapings or transformers that may be combined in logic chains: [###MARKER|bool###], [###MARKER|int###], [###MARKER|dec{1..4}###], [###MARKER|num###], [###MARKER|slug|lower###], [###MARKER|htmid###], [###MARKER|jsvar###], [###MARKER|json###], [###MARKER|lower###], [###MARKER|upper###], [###MARKER|ucfirst###], [###MARKER|ucwords###], [###MARKER|trim###], [###MARKER|substr{1..65535}###], [###MARKER|subtxt{5..65535}###], [###MARKER|url###], [###MARKER|js###], [###MARKER|html###], [###MARKER|nl2br###], [###MARKER|url|js###], [###MARKER|html|nl2br###], [###MARKER|trim|js|html###], [###MARKER|dec2|url###], [###MARKER|js|html###], [###MARKER|css|html###], ..., [###MARKER|url|js|html###], ...)
2.	SPECIAL CHARACTERS and COMMENTS * special characters can be used in templates to assure consistency * commented code in a template will not be rendered at all	[%%%|SB-L%%%] ensures a LEFT SQUARE BRACKET [ [%%%|SB-R%%%] ensures a RIGHT SQUARE BRACKET ] [%%%|SPACE%%%] ensures a SPACE ⎵ [%%%|T%%%] ensures a TAB \t [%%%|N%%%] ensures a LINE FEED \n [%%%|R%%%] ensures a CARRIAGE RETURN \r [%%%|R%%%][%%%|N%%%] ensures a CRLF (CARRIAGE RETURN + LINE FEED) \r\n [%%%COMMENT%%%] This text will never be displayed and will be cut off when rendering this template [%%%/COMMENT%%%]
3.	IF / ELSE [**] * conditionals are available with optional ELSE syntax	[%%%IF:VARIABLE:@==|@!=|@<=|@<|@>=|@>|==|!=|<=|<|>=|>|!%|%|!?|?|^~|^*|&~|&*|$~|$*{string/number/a|list|with|elements/###MARKER###};%%%] conditional IF part, display when condition is matched [%%%ELSE:VARIABLE%%%] conditional ELSE part, display otherwise (optional) [%%%/IF:VARIABLE%%%]
4.	LOOP [**] * expect associative array: (by key/val) or non-associative (by iterator)	[%%%LOOP:ARRAY-VAR%%%] Rendering of Loop syntax is depending upon the array type ; it can be combined with IF / ELSE and the other syntax elements ... * if ARRAY-VAR is a NON-ASSOCIATIVE ARRAY [0=>[row]..n=>[row]] can display for each row the columns 'column-A', 'column-N' which are as ARRAY-VAR[i][column-a] and ARRAY-VAR[i][column-n] where 'i' is the row number for non-associative array and 'row' is an associative array of key/val pairs which must contain at least the keys (columns) 'column-a' and 'column-n' such as: [###ARRAY-VAR.COLUMN-A|int###], [###ARRAY-VAR.COLUMN-B|html###] * if ARRAY-VAR is an ASSOCIATIVE ARRAY [key1=>val1,...,keyN=>valueN] can display for each key/value pair: [###ARRAY-VAR._-KEY-_|html###] = [###ARRAY-VAR._-VAL-_|trim|html###] [%%%/LOOP:ARRAY-VAR%%%]
5.	INCLUDE Sub-Template [**] * can include subtemplates mandatory or optional, includding make use of variable path	[@@@SUB-TEMPLATE:the-main-tpl-relative-path/partials/the-partial-tpl-to-be-includded.inc.htm@@@] mandatory include a partial from the same directory under the sub-directory 'partials' [@@@SUB-TEMPLATE:!web-dir/relative/tpl-path/the-partial-tpl-to-be-includded.inc.htm!@@@] mandatory include a partial from another directory, from inside the app web root [@@@SUB-TEMPLATE:?!web-dir/relative/tpl-alternate-path/the-partial-tpl-to-be-includded-if-exists-only.inc.htm!@@@] optional include a partial from another alternate directory, from inside the app web root [@@@SUB-TEMPLATE:%variable-relative-path-of-sub-tpl-to-include%@@@] mandatory include a variable path partial which is set at the controller level in the section: '%variable-relative-path-of-sub-tpl-to-include%'